ABB TTF350 Operating Instructions Manual page 28

Electrical connection
5.5.2.4 Zone 2
Transmitter design: II 3G EEx nA II T6
Fig. 16
A Sensor
B TTF350 transmitter
Ensure that in case of a disturbance the supply voltage cannot exceed 40% of the normal
voltage.
28
Explosion-protection zone 2
J
A
D
B
C Power supply
D HMI interface for LCD display
TTF350
Safety area
C
A00129
OI/TTF350-EN